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Questions in chemistry

[Homework Help] Select the correct answer. Sugars are polar substances. Which action would make sugar more soluble in water? A. Increase the water temperature. B. Increase the surface tension of the water. C. Decrease the quantity of water. D. Decrease the polar nature of the sugar.

[Homework Help] 1. A fibre also known as artificial silk? 2. A synthetic fibre used for making swimwear? 3. Lycra is the other name of? 4. Plastics that have heavy cross-linking? 5. Substances that cannot be decomposed?

[Homework Help] This is organic chemistry 2 please i need the answer asap iam stuck on it

[Homework Help] Which reasons explain why acids are added to foods? Check all that apply. A. to make the foods more corrosive B. to reduce spoilage C. to add zest or sour taste to food D. to make the food taste bitter

[Homework Help] In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen. [tex]6 CO_2+6 H_2 O \rightarrow C_6 H_{12} O_6+6 O_2[/tex] Which component could be added to complete this chemical equation? A. right energy B. ATP and NADPH C. chemical energy D. rubisco

[Homework Help] The mass of an empty container is 50.2 ± 0.3 g, and the mass of the container with a substance inside is 90.8 ± 0.5 g. The mass of the substance is: Select one: A. 40.6 ± 0.8 g B. 40.6 ± 0.2 g C. 40.6 ± 0.5 g D. 40.6 ± 0.3 g E. 41 ± 1 g

[Homework Help] The molality of a solution containing 36g of glucose (C6H12O6) in 250g of water is: (a) 0.4 m (b) 0.6 m (c) 0.8 m (d) 1.2 m

[Homework Help] Which represents the correct equilibrium constant expression for the reaction below? [tex]Cu(s)+2 Ag^{+}(aq) \longleftrightarrow Cu^{2+}(aq)+2 Ag(s)[/tex] A. [tex]Keq =\frac{[ Cu ]\left[ Ag ^{+}\right]^2}{\left[ Cu ^{2+}\right][ Ag ]^2}[/tex] B. [tex]K_{e q}=\frac{\left[ Cu ^{2+}\right]\left[ Ag ^2\right.}{[ Cu ]\left[ Ag ^{+}\right]^2}[/tex] C. [tex]Keq=\frac{\left[ Ag ^*\right]^2}{\left[ Cu ^{2+}\right]}[/tex] D. [tex]Keq=\frac{\left[ Cu ^{2+}\right]}{\left[ A g ^{+}\right]^2}[/tex]

[Homework Help] Use the periodic table in the tools bar to answer these questions. How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?

[Homework Help] Despite their efficiency, what environmental concern is raised about compact fluorescent bulbs? A. excessive brightness B. mercury content and disposal C. too efficient